I am glad to present the book name "Cyber Law and Cyber Security". This book is based on the new syllabus for GTU subject naming Cyber Security for B.E. Semester V. This book is not only useful for students but also for professionals like Doctors, Engineers and Lawyers for the purpose of practice. The main objective is to spread the awareness of varius crimes happening in our day-to-day life by using latest technologies. Our Prime Minister Mr. Narendra Modi has launched programme naming Digital India. Digital India is a massive tech push to provide electonic governance and universal phone connectivity across the country. The aim is to bridge India's digital divide, bringing in large investmens in technology manufacturing.